Widened margins does not occur at the continental margin
Four chambered heart keeps oxygenated and deoxygenated blood separate and has double circulation while three chambered heart has a single circulation. Two chambered heart only has single atrium and single ventricle
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Answer:
Homeostasis is controlled by the nervous and endocrine system in mammals
Explanation:
Nervous system when you touch a hot pan the nervouse system sends a message to move or feel pain
Endocrine system releases hormones into the bloodstrram that helps our growth and development,helps our organs work metabolism,and reproduction
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